Leak-proof strip for metal roofing.



OFFIQE.

KARL ROTH. 0F TERRE HAUTE, INDIANA.

LEAK-PROOF STRIP FOR METAL ROOFING.

Specification of Letters Patent.

Application filed March 25, 1913.

Patented Oct; 21, 1913.

Serial No. 756,703.

lo it known that l, KARL. Born, a citizen of the United States, residing at Term llante, in the county of "lg-o and State of Indiana, have invented certain new and useful Improvements in Leak-Proof Strips for Metal Rooting, of which the following is a specification.

In the manufacture of sheet metal roofing special effort is made to provide joints between the metal sheets which shall resist the action of capillary attraction and thereby prevent water from passing between the overlapping edges of the sheets. To attain this end a large variety of different crimp ings along the edges of each individual sheet are employed which mesh or register with crimps of like forn'uition in the adjacent sheets, all tending to make ater-tight j ints when the sheets are placed in position. These special arrangements in connection with sheet metal roofing add to the cost; of such manufacture. In case re 'ular eorrugated iron is used, which is used to a large extent to cover the roofs of buildings, the sheets must be lapped for several corrugations so that considerable. material is lost to each square laid, and this wide overlapping of the edges does not always provide watertight joints from the fact that the water oftt-imes moves along between the contacting surfaces of the overlapping sheets, induced; by capillary attraction, making the plainest' sort of a. corrugated roof expensive, and one that is liable to leak at any time.

This invention relates to an individual metal joint or strip, formed independently of the metal sheets that form the roof, these metal joints being provided with a centrally located strip corresponding to the crimping in the metal sheets, thereby making it specially desirable to use in connection with rooting already in use.

The object of the invention consists in the provision of a sheet metal strip for sealing the joint between the overlapping edges of sheet metal rooting, thereby insuring that the joints between the sheets of metal roofing will be made, proof against leakage. I

A further object of the invention is to provide a sheet metal joint for sheet metal roofing which is independent of the sheets, and which will be cheap to manufacture in View of its disconnection from the metal sheets forming the roof, and one that. can be used showing its character and formation when used in connection with the old and well known eorru 'ated metal sheets. F1". 3 is a fragmentary detail view in cross section ot .a \\'ell..known sheet metal roofing wherein V-shaped corrugations or crimrnngs are employed. and showing my independently formed joint or strip in operative position therewith. Fig. 4 is a fragmentary detail perspective view of the independently formed sheet metal strip showing the V-, "shaped corrugation therein.

Referring to the drawings, 10 represents the ordinary sheathin of buildings that is nailed to the rafters It. the application ot' old and well known Fig. 1 illustrates corrugated metal sheets which sexton-- sively used in iormimr roots-For ljmldin'ts, 1

said sheets herein being designated by he numerals l)- and t3. now employed the edges of these earl-u att-d sheets are overlapped to the extent of from two to three of the corrugations in order to reduce the. possibilit uof leakage to a minimum. This.

wide overlapping of the sheets consumes quite an additional amount of material to the square and does not entirely render the joint. tight against the passage of water for the reason heretofore explained.

l am aware of the fact that therev are numerous sheet metal rooting or the market wherein each plate is provided with a certain kind of corrugation or crimping along the edges. in order to term air spaces and the like, all tending to produce a waterproof seam between the overlapping edges of the sheet metal roofing. llm'ttfltl'. these extra crimpings not only require special machines which add to the c st of production, but are 110 not capable of lr-inp; used in connection with or in the repairing; of roots that are already in use.

My iniproi cal m al joint, which is formed imhipendently and may he sold independently of sheet metal roofing, is forEXW-d of a flat strip of sheet metal 20, and may be of the same character as that employed in manufacturing the Metal sin-re; ot the root. Each metal strip is prcridcd with a cei'r trolly ai anged longitlulinally extending corrugation 2L which is properly formed to corres 'iond to and engage. the corrugation formed in the ro fv 'l'his centrally formed corrugation 21 adds additional st ength and reinfor es the met-lapping edges f the sheets 19 and is so that the usual wood strip. which is inserted beneath this particular corrugation to prevent the corrugation from being flattened. when the nails are passed through the sheets, is dispensed with. 'ihe edges of the strips J) are bent into a vertical position to form the shoulders 22 so that a cuannel or gutter is formed on each side of the corrugation 21 and the sl-iouldt-rs 22, these hannels adapted to con- ]inp, and tarry away such W lttil' {1S ll'ltty gain access thereto utter passing between the overlapping edges of the plates 12 and 13. The strips 30 containing the double channels .271 have an a'hantage in that they may be laid either way beneath the overlapping edges of the plates 12 and 13, the only prerequis e hein'g that the r-orrugations 21 and shoulders Elf: 'must projec upwardly from the sheathing 10, but it is readily seen that the cost, of the strip 20 can be still further reduced lay i'nerely providing a single channel and a single shoulder 22 with the central corrugation 21, omitting the rest of the stock from the line A-A in Fi". 2. While this would. eheapen the cost of manufacture it will be noted that the strips 20 must of necessity be laid one way with respect to the overlapping: edges of its sheets in order to get the benefit derived from the single Chan? nel 23 remaining in the strip. l t will be noted that the shoulders 22 do not touch the metal sheets 12 and 13 so that an intervening space remains, to resist the action of capillary attraction. Figs. 3 and 4, While showing a different style of crimping, practically illustrate the same construction as shown in Figs. 1 and 2, 'whieh has heretofore lions, the overlapping adjacent edges oi": th

sections adapted to permit the corrugations in one section to engage the corrugations in the adjacent section. a strip formed inde' pendently of said sections and adapted to lie beneath the overlapping edges of said sections, a corrugation formed in said strip to engage the corrugations in the sections, and. shoulders formed. of the side edges of the strip to raise said edges above the floor of the strip.

9. sheet metal roof comprising; a plurality of sheet metal sections, longitmlinallr extending eorrueations formed parallel with the side edges of said sections, the overlapping adjacent edges of the sections permitting the corrugations in one section to register with the corrugations in the adjacent section, an independently formed strip adapted to boinserted beneath the overlapping edges of the sections, shoulders formed along the edges of the strip, and "means formed in the strip to engage the corrugations in the sections for holding said strip in operative relation with said sections.

In Witness whereof, l have hereunto set my hand and seal at. Indianapolis,Indiana, this 26th day of lteln'uary, A. I one thousand nine hundred and thirteen.

KARL ROTI l.

Vitnesses F. W. Vt oium on, I. L. LAnsoN.

l li. 

